Fix geo GraphQL schema mismatch: camelCase → snake_case

All geo .graphql operations and consuming code updated to match
server schema which uses snake_case field/argument names.
Removed non-existent QuoteCalculations query, using NearestOffers instead.

graphql/operations/public/geo/HubsList.graphql

@@ -1,11 +1,11 @@
 query HubsList($limit: Int, $offset: Int, $country: String, $transportType: String, $west: Float, $south: Float, $east: Float, $north: Float) {
-  hubsList(limit: $limit, offset: $offset, country: $country, transportType: $transportType, west: $west, south: $south, east: $east, north: $north) {
+  hubs_list(limit: $limit, offset: $offset, country: $country, transport_type: $transportType, west: $west, south: $south, east: $east, north: $north) {
     uuid
     name
     latitude
     longitude
     country
-    countryCode
-    transportTypes
+    country_code
+    transport_types
   }
 }